From what I understand, here's the difference.
Parking lights are the turn signals on dim (non-blink) setting.
DRL's are usually your high beams on a 40-50% setting. This is not true for the Miata. The DRL is contained in the outer turn signal on non-US models.
City lights are separate from the low and high beams and use a dedicated low-wattage bulb. They faintly light up the housing, and are used on non-US cars. They're required in heavy urban areas such as London and Paris.
Parking lights are the turn signals on dim (non-blink) setting.

DRL's are usually your high beams on a 40-50% setting. This is not true for the Miata. The DRL is contained in the outer turn signal on non-US models.

City lights are separate from the low and high beams and use a dedicated low-wattage bulb. They faintly light up the housing, and are used on non-US cars. They're required in heavy urban areas such as London and Paris.
